Effect of injection pressure on the plasma-liquid interaction in a stepped-wall liquid chamber

Liu, Yi; Yu, Yonggang; Mang, Shanshan

doi:10.1016/j.ijheatmasstransfer.2019.119156

Cited by 4 publications

(2 citation statements)

References 23 publications

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“…In eq , the initial compressed energy at the left-hand side is irrelevant to the chamber structure but depends on the plasma generator and pulse-forming network. However, previous studies have shown that a substantial liquid phase corner vortex appears when the plasma jet passes through a stair . This means that the stair geometry increases E vortex in eq significantly.…”

Section: Theoretical Approachmentioning

confidence: 92%

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Plasma–Liquid Interface Manipulated by Chamber Structure: An Experimental and Theoretical Approach

Liu

Lin

et al. 2020

ACS Appl. Mater. Interfaces

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To respond to global challenges of environmental contaminations, pursue more advanced material technologies, and achieve novel biomedical therapies, a variety of plasmas have been applied to wastewater and food processing, biomaterial treatments, and plasma−liquid ignitions. As these applications highly depend on the plasma−liquid interactions, researchers are now focusing on the physical and chemical reactions on the plasma−liquid interface. With massive publications reporting the molecular transfers, chemical pathways, and their effects on plasma treatments, this work provides a new point of view that the plasma−liquid interface can be manipulated by the chamber structure. In the experiment, plasma jet expansion in water is recorded in a cylinder chamber and a stepped-wall one. Data collected from the images show that the stepped-wall structure results in a shorter axial interface propagation, a small volume, more symmetry for the plasma jet, and more stability for the interface. To discover the physical mechanism behind these phenomena, we derived the momentum and energy equations for the plasma−liquid interface during its propagation. Those equations reveal how the stepped-wall structure can be used to manipulate the interface behaviors. Along with our experimental and theoretical investigation of the plasma−liquid interface, such information also sheds light on how the chamber wall structure can be used to manipulate the interface chemical reaction rates, stability, and expansion rate. This work is thus a basis of the future optimization for plasma−liquid treatments and ignitions which will be equipped with a flexible wall controlled by artificial intelligence to automatically achieve a variety of plasma treatment requirements.

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Section: Theoretical Approachmentioning

confidence: 92%

“…However, previous studies have shown that a substantial liquid phase corner vortex appears when the plasma jet passes through a stair. 24 This means that the stair geometry increases E vortex in eq 13 significantly. On the other hand, multiple publications indicate that the flow velocity is proportional to the evaporation rate.…”

Section: ■ Theoretical Approachmentioning

confidence: 97%